Improved method of hanging oentee-boaeds of vessels



g @1t-itery tant gamut @frn IVILLIAM W. BATES, OF CHICAGO, ILLINOIS.

Letters Patent No. 64,739, dated Hay-14, 1867,

IMPROVED METHOD 0I:` HANGING CENTRE-BARDS 0F VESSELS.

alle tlgthule maar tu im tlgrse gitttts gl'titmt mit making init .of tige aime.

TO ALL WHOM IT MAY CQNCERN: l,

Be it known that I, WILLIAM W. BATES, of the city et' Chicago, in the county. of Cook, and Stato oi' Illinois, have invented new and useful improvements in the Method of Hanging Centre-Boards in Vessels, and I de hereby declare that the following is a full und exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which;

Figure 1 represents the elevation of the centre-board and the frame tohung it.

Figure 2 represents cross-section ot' the same along the line M N.

Figure 3 representsthe ends of the frame-arms when one bolt is used for suspension of the frame.

Figure 4 is the plan of an eye-bolt; and

Figure 5, the section of the end of the board when frame-plates arc welded together.

Similar letters of reference in each ot' the several figures indicate corresponding parts ot' the arrangement.

The nature ofv my invention consists in pinning the ecntreboard to 4a metallic frame instead of to the sides of the centro-board case or box, as' thel caseis now, and to hang said frame on to the head ledge of and within' the said case or bex, in the manner as will be hereinafter -fully explained.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation. l

- The fore part of the contre-board A is. cut away on both sides for the thickness of plates of the sustaining or hanging frame B, which consists of a pair of angular plates, -b b, whose fore ends are welded to heavy, square eross-pieces C C, or simply welded together, as on g. 5, the edge ofthe centre-board being shaped accordingly. At their angle these plates are bent inside, so asto be overlapped by the pintle-plates D D, and have eyes, into which enter the pintles d d, Set on the inner sides et` the pintle-plates, which last, in their turn, are firmly secured by bolts to the centre-board, the outside surfaces of the plates ofthe frame B and of pintle-platcs D D being made ush with the surface of the centre-board. There are eye-bolts or eye-straps E E secured to the head ledge ofthe centre-board box G, forthe purpose of hanging the frame B, the opening of said eyes being made oval in the at-hwart-ship direction, as shown in iig. 4, to allow the centre-board to have some lateral mot-ion. There may be two different ways of suspending frame -B to the head-ledge eye-bolts E E. One is tohave the cross-pieces C C, or the welded fore ends of pla-tes b b, provided with pintles ff, by inea-ns of which frame B may be suspended on the eye-bolts E E, asshown on iig. 1v; and in this case a block, II, has to be secured inside of the box G to prevent frame B from being raised out of the eye-bolts E E. The other is to have the crosspieces C C, or the welded ends of the plates-12 @provided with eyes instead of pintles, and ,the frame B sus pended by means of a long bolt, I, passing through the eyes and the eye-bolts, as shown on tig. 3.- In case an iron centre-board is desirable I propose to make it ont of thin iron plates, inthe shape ot' a'box, with a space inside, placing my pintle-plates and the sustaining frameeither inside or outside of the centre-board.

The advantages of my system of hanging the centre-boards in vessels are the following: The pin on which the centre-boards revolve now is placed below the water line, passing through the entire box, and therefore produces leakage and damages cargoes, while my pintle-plates, being placed inside of the box, produce no leakage at all. With the present system, .to unship the centre-board for repairs it is necessary to first unload the cargo in order to reach the pin, while with my arrangements the board may he taken out'ot' its box for 'repairs and reshipped again any time without touching the cargo, a fact to be appreciated particularly by ship-y owners and masters. y y

What I claim as my invention, and desire to secure by Letters latent, is

I claim suspending the centre-board of vessels by means constructed and arranged substantially as described. v

WILLIAM W. BATES.

Witnesses:

J. B. Tunennv, Jus. R. Harman.

of the frameB, in combination with the plates D, 

